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monguurl's Issues

Troubles on update

Hi,
sorry to bother you
and thanks for sharing :)
The module works fine on save
but when I update a collection like

exports.post = function(req, res, next, id) {
    // http://stackoverflow.com/questions/14940660/whats-mongoose-error-cast-to-objectid-failed-for-value-xxx-at-path-id
    if (!/^[0-9a-fA-F]{24}$/.test(id)) {
        return res.jsonp(404,{ error: 'Failed to load post with id ' + id });
    }
    Post.findById(id).exec(function(err, post) {
        if (err) {
           return next(err);
        }
        if (!post) {
            return res.jsonp(404,{ error: 'Failed to load post with id ' + id });
        }
        req.post = post;
        next();
    });
};
/**
 * Update a post
 */
exports.update = function(req, res) {
    var post = req.post;
    post = _.extend(post, req.body);
    post.save(function(err) {
        if (err) {
            var errs = Object.keys(err.errors);
            if (errs.length > 0){
               return res.json(500,{ error: err.errors[errs[0]].message }); 
            }
            return res.json(500,{ error: 'Cannot save the post' });
        } 
        res.json(200,post);
    });
};

the slug don't get updated.

how to run update slug?

I checked the documentation but couldn't find a solution, what if the slug's origin field updates and i want the slug to be updated too?

Update a title, that updates the slug

Hi, I have an article schema (see below). It works great for creating slugs on insert, but it is possible to update the slug on title change (update) please?

var mongoose = require('mongoose'),
    monguurl = require('monguurl');

ArticleSchema = new mongoose.Schema({
    title: {
        type: String,
        trim: true,
        required: true
    },
    slug: {
        type: String,
        index: {
            unique: true
        }
    }
});

ArticleSchema.plugin(monguurl({
    source: 'title',
    target: 'slug'
}));

module.exports = mongoose.model('Article', ArticleSchema);

Thanks

doc.model is not a function 

 error: uncaught exception:   TypeError: doc.model is not a function

  - monguurl.js:89 model.hasUniqueAlias
    [firsat.io]/[monguurl]/lib/monguurl.js:89:11

  - monguurl.js:64 model.findUniqueAlias
    [firsat.io]/[monguurl]/lib/monguurl.js:64:11

  - monguurl.js:57 model.makeUniqueAlias
    [firsat.io]/[monguurl]/lib/monguurl.js:57:11

  - monguurl.js:40 model.<anonymous>
    [firsat.io]/[monguurl]/lib/monguurl.js:40:12

  - hooks.js:62 _next
    [firsat.io]/[hooks-fixed]/hooks.js:62:30

  - hooks.js:186 fnWrapper
    [firsat.io]/[hooks-fixed]/hooks.js:186:8

  - schema.js:832 model.<anonymous>
    [firsat.io]/[mongoose]/lib/schema.js:832:7

  - hooks.js:62 _next
    [firsat.io]/[hooks-fixed]/hooks.js:62:30

  - hooks.js:186 fnWrapper
    [firsat.io]/[hooks-fixed]/hooks.js:186:8

  - schema.js:225 model.fn
    [firsat.io]/[mongoose]/lib/schema.js:225:11

  - hooks.js:62 _next
    [firsat.io]/[hooks-fixed]/hooks.js:62:30

  - hooks.js:186 fnWrapper
    [firsat.io]/[hooks-fixed]/hooks.js:186:8

  - schema.js:200
    [firsat.io]/[mongoose]/lib/schema.js:200:17

  - index.js:127
    [firsat.io]/[mongoose]/[kareem]/index.js:127:16

  - next_tick.js:73 _combinedTickCallback
    internal/process/next_tick.js:73:7

  - next_tick.js:104 process._tickCallback
    internal/process/next_tick.js:104:9

Using on embedded documents

Getting the following error:

TypeError: undefined is not a function
    at EmbeddedDocument.<anonymous> (/home/sharry/Development/Projects/site/node_modules/monguurl/lib/monguurl.js:40:12)
    at _next (/home/sharry/Development/Projects/site/node_modules/mongoose/node_modules/hooks-fixed/hooks.js:62:30)

Model

"use strict";

var mongoose = require('mongoose'),
    monguurl = require('monguurl'),
    timestamps = require('mongoose-timestamp');

var PageSchema = new mongoose.Schema({
    title: {
        type: String,
        trim: true,
        required: true
    },
    slug: {
        type: String,
        index: {
            unique: true
        }
    },
    body: {
        type: String,
        required: true
    },
    order: {
        type: Number,
        required: true
    },
    status: {
        type: String,
        required: true,
        enum: ['live', 'hidden'],
        default: 'hidden'
    }
});

var SectionSchema = new mongoose.Schema({
    title: {
        type: String,
        trim: true,
        required: true
    },
    slug: {
        type: String,
        index: {
            unique: true
        }
    },
    excerpt: {
        type: String,
        required: true
    },
    order: {
        type: Number,
        required: true
    },
    pages: [PageSchema]
});

/**
 * Book Schema
 */
var BookSchema = new mongoose.Schema({
    contentType: {
        type: String,
        trim: true,
        required: true
    },
    slug: {
        type: String,
        index: {
            unique: true
        }
    },
    section: [SectionSchema]
});


/////////////////////////////////////////////////////////////
// PLUGINS
/////////////////////////////////////////////////////////////
PageSchema.plugin(monguurl({
    source: 'title',
    target: 'slug'
}));

SectionSchema.plugin(monguurl({
    source: 'title',
    target: 'slug'
}));

BookSchema.plugin(monguurl({
    source: 'contentType',
    target: 'slug'
}));

Controller:

Book.findOne(
        {
            'slug': 'support'
        }
    )
   .exec(function(err, book) {
        if (err) {
            return next(err);
        } else {

            var section = {
                title: "Section 1",
                excerpt: "Section 1 excerpt here",
                order: 1
            };

            // Create a new section
            book.section.push(section);

            book.save(function (saveBookErr, book) {
                if (saveBookErr) {
                    return next(saveBookErr);
                } else {
                    res.send('Book updated')
                }
            });
        }
    });

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